Click to expand Tap to zoom Rampa - Insert Nuts 48 reviews DescriptionDescriptionRampa Inserts (Type SKD330) with hex drive, sealing collar and unthreaded lead. Size: 15mm or 18mm Diameter (D): 12mm Thread (d): 1/4-20 UNC Material: Steel, zinc plated Driver Size: 6mm We recommend either the 10mm or 10.5mm Brad Point Bits by FAMAG depending on the hardness of material. Choose a variant 15mm - $0.92 18mm - $0.96 Size: 15mm 15mm 18mm Original price $0.92 - Original price $0.96 Original price $0.92 $0.92 - $0.96 Current price $0.92 | / 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart